Classification
330 - Economics
363 - Other social problems & services
581 - Specific topics in natural history
600 - Technology
700 - The arts; fine & decorative arts
333 - Economics of land & energy
5
630 - Agriculture & related technologies
4
551 - Geology, hydrology & meteorology
3
620 - Engineering & allied operations
3
140 - Specific philosophical schools
2
320 - Political science
2
380 - Commerce, communications & transportation
2
610 - Medicine & health
2
900 - History & geography
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
340 - Law
1
350 - Public administration & military science
1
370 - Education
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
612 - Human physiology
1